JP3268906B2 - Extra-fine fiber fabric with good coloring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester ultrafine fiber cloth having good coloring properties, and more particularly, to a polyester ultrafine fiber cloth which has good dyeing properties and is excellent in deep color of dyed fibers.

[0002]

2. Description of the Related Art As methods for obtaining ultrafine fibers, there are a direct spinning method, a method of extracting sea-island fibers by multi-core sheath spinning, and a method of splitting conjugate fibers, and taking advantage of the soft and smooth characteristics of ultrafine fibers. It is used for artificial suede, high-grade wool, silk-like material, etc. and is currently in the spotlight. However, since these products use ultrafine fibers, an increase in the surface area of the fibers causes remarkable irregular reflection of light, and the resulting dyed product has a drawback that the resulting dyed product has a whitish and deep color. .

[0003] As one method of improving such a defect, the dye concentration is increased to increase the amount of dyeing. However, as the amount of dyeing increases, the amount of dye adsorbed on the surface increases.
On the contrary, it has disadvantages such as a decrease in color fastness, and a very deep color such as black has a limited color depth, and a deeper color cannot be obtained.

Polyester fibers are widely used because they have many properties. However, polyester fibers have a higher color than natural fibers such as wool and silk and semi-synthetic fibers such as rayon and acetate. There is an essential disadvantage that the sharpness, the depth of the deep color, especially the darkness of the black color and the color development are inferior. The causes of this defect are that the polyester fiber is dyed with a disperse dye having poor color clarity, the refractive index of the polyester fiber is 1.7, which is higher than other fibers, and the reflectance of light on the fiber surface is high. And as a result, the intensity of white reflected scattered light from the surface of the cloth increases.

As a method of improving these disadvantages, a modification has been made to introduce a seat capable of dyeing a vivid color dye such as a cationic dye or an acid dye on polyester fiber. Even so, the light reflection scattering based on the high refractive index of the polyester fiber does not decrease, and does not essentially improve the color depth. On the other hand, it is well known that when the fiber surface is coated with a compound having a low refractive index, the color looks darker and the depth increases.It is well known that a low refractive index compound such as an organic fluorine compound or an organosilicon compound has been coated on the fiber surface. Ni-
(Japanese Patent Publication No. 2-429)
No. 38). A method has also been proposed in which fine irregularities having a finer pitch than the wavelength of light are formed on the fiber surface to suppress the reflection on the fiber surface (Japanese Patent Publication No. 59-24233).
JP, JP-B-62-20304, JP-B-62-20304
No. 28229).

[0006] However, the method of coating the fiber surface with a compound having a low refractive index has poor durability against dry cleaning, and in order to obtain a sufficient dark color effect, it requires a larger amount than that used in ordinary texture processing. The low refractive index compound must be used, and even if a deep color effect is achieved, problems such as a change in hand feeling and a decrease in the fastness of the dyed product arise. In the method of forming fine irregularities on the fiber surface, the surface irregularities are damaged in the processing step, and the dark color effect is reduced. Occurs. As described above, polyester fibers, especially polyester ultrafine fibers, have excellent dyeing properties and coloring properties,
Further, there has not yet been proposed an ultrafine fiber which is excellent in deep color and has no problem in consumption performance.

[0007]

Under these circumstances, the inventors of the present invention have been keen to obtain a fabric made of ultrafine fibers having a depth and a large color developing property and a single yarn fineness of 0.3 denier or less. As a result of the investigation, it was possible to lower the refractive index of the polyester by copolymerizing a specific compound with the polyester, thereby achieving the object of the present invention.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a fabric containing 10% by weight or more of ultrafine fibers having a single-fiber fineness of 0.3 denier or less, wherein the ultrafine fibers contain terephthalic acid as a main dicarboxylic acid component. A polyester fiber containing ethylene glycol as a main diol component, wherein a compound represented by the following formula (I) is 1 to 20 mol% based on all diol components, and / or a compound represented by the following formula (II) ) Is a polyester fiber obtained by copolymerizing the compound represented by the formula (1) with 1 to 20% by weight based on all dicarboxylic acid components.

Embedded image (In the formula, m represents 0, 1 or 2.)

Embedded image (Wherein, R represents a hydrogen atom or a lower alkyl group;
Represents 0, 1 or 2. )

The polyester constituting the fabric of the present invention is:
Terephthalic acid is the main dicarboxylic acid component, and ethylene glycol is the main diol component. As dicarboxylic acids other than terephthalic acid, isophthalic acid, phthalic acid,
Naphthalenedicarboxylic acid, biphenyldicarboxylic acid,
4,4'-diphenyletherdicarboxylic acid, 4,4 '
-Diphenylmethanedicarboxylic acid, 4,4'-diphenylsulfonedicarboxylic acid, 4,4'-diphenylisopropylidenedicarboxylic acid, 1,2-diphenoxyethane-4 ', 4 "-dicarboxylic acid, anthracenedicarboxylic acid, 2,5 -Aromatic dicarboxylic acids such as pyridine dicarboxylic acid, diphenyl ketone dicarboxylic acid and sodium sulfoisophthalate; aliphatic dicarboxylic acids such as malonic acid, succinic acid, adipic acid, azelaic acid and sebacic acid; decalin dicarboxylic acid, cyclohexane dicarboxylic acid and the like An alicyclic dicarboxylic acid; β-hydroxyethoxybenzoic acid,
hydroxycarboxylic acids such as p-oxybenzoic acid, hydroxypropionic acid, hydroxyacrylic acid; or carboxylic acids derived from their ester-forming derivatives,
Aliphatic lactones such as ε-caprolactone can be mentioned, and these aromatic dicarboxylic acid units may be contained in only one kind or two or more kinds, in a proportion of 10 mol% or less based on all dicarboxylic acid components. .

The diol components other than ethylene glycol include trimethylene glycol, tetramethylene glycol, hexamethylene glycol, neopentyl glycol, diethylene glycol, polyethylene glycol and the like. Aliphatic diols; hydroquinone, catechol,
Naphthalene diol, resorcinol, bisphenol A,
Aromatic diols such as ethylene oxide adduct of bisphenol A, bisphenol S, and ethylene oxide adduct of bisphenol S; and alicyclic diols such as cyclohexane dimethanol. These diols may be used alone or in combination of two or more, and may be contained in a proportion of 10 mol% or less based on all diol components.

Further, the polyester according to the present invention includes:
Polyhydric carboxylic acids such as trimellitic acid, trimesic acid, pyromellitic acid, and tricarballylic acid within a range where the polyester is substantially linear; such as glycerin, trimethylolethane, trimethylolpropane, and pentaerythritol. A polyvalent alcohol may be contained.

The polyester according to the present invention needs to be copolymerized with a compound represented by the following formula (I) and / or a compound represented by the following formula (II).

[0013]

Embedded image (In the formula, m represents 0, 1 or 2.)

[0014]

Embedded image (Wherein, R represents a hydrogen atom or a lower alkyl group;
Represents 0, 1 or 2. )

When only the compound represented by the formula (I) is copolymerized, its copolymerization amount is 1 to 20 mol%, preferably 2 to 1 mol%, based on all the diol components constituting the polyester.
The range is 5 mol%. When only the compound represented by the formula (II) is copolymerized, its copolymerization amount is in the range of 1 to 20 mol%, preferably 2 to 15 mol%, based on all dicarboxylic acid components. When the compounds of the formulas (I) and (II) are used as the copolymerization component, the copolymerization amount thereof is 1 to 20 mol%, and 2 to 15 mol%, based on the total dicarboxylic acid component. Is preferably within the range.

When the copolymerization amount of the compound represented by the formula (I) and / or the compound represented by the formula (II) is less than 1 mol%, the crystallinity of the copolymerized polyester resin decreases, the refractive index decreases, The decrease in birefringence during orientation during fiber formation is insufficient, and the effect of improving fiber dyeing properties, coloring properties, and deep-color properties is small. On the other hand, if the copolymerization amount of the compound exceeds 20 mol%, it is difficult to obtain a crystalline resin, and even if it is obtained, its melting point is low and it does not satisfy the heat resistance required for polyester fibers. . Further, as the copolymerization amount of the compound represented by the formula (I) or the compound represented by the formula (II) increases, the crystallinity and the melting point of the polyester decrease, and the dyeability and the depth of the polyester fiber are reduced. Although the colorability is improved, the heat resistance tends to decrease. Therefore, the copolymerization amount may be changed in consideration of the heat resistance, dyeability, deep color, and the like required for each fiber application.

The intrinsic viscosity of the polyester according to the present invention [phenol / tetrachloroethane (weight ratio 50/5)
0) measured at 30 ° C. using the mixed solvent of 0.4) to 0.4 to 1.
It is preferably 5.

The above polyester can be produced according to a usual method generally employed for producing a usual polyester resin such as polyethylene terephthalate. For example, a dicarboxylic acid raw material composed of a dicarboxylic acid mainly composed of terephthalic acid or a lower alkyl ester thereof, and a glycol mainly composed of ethylene glycol.
The raw material is subjected to an esterification reaction or a transesterification reaction to produce a low polymer, and then the low polymer is subjected to a polymerization reaction under reduced pressure using a polymerization catalyst such as antimony trioxide, germanium oxide, or tetraalkoxyethane for 230 to 300. A polycondensation reaction is performed at 300 ° C. to produce a polyester having a desired viscosity. If desired, the degree of polymerization can be increased by solid phase polymerization to produce a polyester having a high intrinsic viscosity. In this production method, the compound represented by the above formula (I) is used as a part of the glycol raw material, the compound represented by the above formula (II) is used as a part of the dicarboxylic acid raw material, or both of them are used. By using it, the polyester according to the present invention is obtained.

The above-mentioned polyester may be added with other thermoplastic resin in an amount within a range not impairing the effects and functions of the present invention, or may be an ultraviolet absorber, a coloring inhibitor, a heat-resistant agent, a fluorescent brightener, an antioxidant, etc. An additive such as an agent, a matting agent, an antistatic agent, a flame retardant, a flame retardant auxiliary, a lubricant, a plasticizer, and inorganic fine particles may be contained.

In order to obtain the polyester ultrafine fiber of the present invention, particularly the ultrafine fiber having a single fiber fineness of 0.3 denier or less, the direct spinning method, the sea-island fiber extraction method, and the splitting of the splittable conjugate fiber as described above. And any of these methods. The obtained spun yarn may be stretched by an ordinary method.For example, after preheating at a temperature near the glass transition temperature of the copolymerized polyester by a heating roller, a stretching ratio according to the speed of the winding roller. And heat-treating at a temperature equal to or higher than the crystallization temperature of the polyester. Further, the heat treatment may be performed by drawing by a method in which spin drawing is directly connected such as spin draw.

The cross section of the polyester microfine fiber is circular; it may have any cross-sectional shape such as polylobe such as trilobe to octalobe, T-shape, V-shape, flat shape and square shape. And not only solid fibers but also hollow fibers or porous fibers.

The term "fabric" as used in the present invention includes all two-dimensional structures such as woven fabric, knitted fabric and non-woven fabric. In the present invention, it is necessary that the above-mentioned ultrafine fibers having a single yarn fineness of 0.3 denier or less account for 10% by weight or more of the fibers constituting the fabric. When the content of the ultrafine fibers is less than 10% by weight, the desired fine touch feeling is insufficient, and the color developability and the deep color are insufficient.

The reason why the coloring property of the polyester microfibers according to the present invention is improved as compared with microfibers made of ordinary polyethylene terephthalate is not at present estimated, but is considered as follows. . The degree of crystallinity is reduced by introducing an aliphatic cyclic skeleton into the polyester skeleton, the refractive index of the polyester is reduced, and the refractive index in the direction parallel to the fiber axis and the refractive index in the direction perpendicular to the fiber axis. By reducing the rate difference, that is, by lowering the birefringence as compared to conventional polyester fibers, scattered light originating from the reflection on the fiber surface is suppressed, and color development not found in conventional polyethylene terephthalate fibers is achieved. A fiber with excellent properties is obtained. In addition, the smaller the single-fiber fineness, that is, the finer the fibers, the larger the surface area of the entire fiber constituting the fabric, so that the ultra-fine fiber cloth made of ordinary polyethylene terephthalate has an extremely low coloring property. As a matter of fact, the polyester ultrafine fibers according to the present invention can suppress the scattered light resulting from the reflection on the fiber surface, so that an ultrafine fiber cloth with improved coloring properties can be obtained. In the present invention, the smaller the single-fiber fineness of the ultrafine fibers is, the more the effects such as color developability and deep color develop.

The ultrafine fibers according to the present invention are used in the form of filaments, staples, etc., and they may be used alone, or they may be used after being mixed with other materials or blended. . The ultrafine fiber fabric of the present invention contains the above ultrafine fibers and has a soft and smooth characteristic, and is suitable as an artificial suede, high-grade wool, silk-like material, or the like.

[0025]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. In addition, the measured value in an Example is a value obtained by measuring by the following method.

(1) Copolymerization rate (mol%) of the compounds represented by the formulas (I) and (II) The results of 1 H-NMR measurement of the polyester according to the present invention using deuterated trifluoroacetic acid as a solvent Calculated based on

(2) Intrinsic viscosity of polyester (dl /
g) Phenol / tetrachloroethane (weight ratio 50/50)
Was measured at 30 ° C. using a mixed solvent of

(3) Physical properties of polyester Glass transition temperature of polyester (hereinafter abbreviated as Tg)
(° C) and melting point (hereinafter abbreviated as Tm) (° C)
Scanning Calorimeter (Metra-TA3000, Par
Kinelmer Co., Ltd.), using a 10 mg sample, measuring the temperature while increasing and decreasing the temperature at a rate of 10 ° C./min while performing nitrogen replacement. This operation was repeated twice with the same sample, and the second measurement was performed. And The heat of crystal fusion (J / g) after the sample was heat-treated and sufficiently crystallized was measured by the above-mentioned apparatus, and the result was shown as the crystallinity.

(4) Physical properties of polyester ultrafine fiber cloth a. L ↑ * value Using a color analyzer (Hitachi 307, manufactured by Hitachi, Ltd.), measure the reflectance of the visible portion of the dyed material, determine the trichromatic stimulus value Y from the reflectance at each wavelength, and determine from the following formula. Was. L ↑ * = 116 (Y / 100) ↑ (1/3) -16 b. Color fastness to washing A test was conducted according to the A-2 method in accordance with JIS L 0844. Nylon cloth was used as an impregnated white cloth, and the degree of contamination was evaluated with a contamination gray scale. c. Depth of chromaticity (k / s) The spectral reflectance (R) of the sample cloth was measured using a color analyzer.
(Hitachi 307, manufactured by Hitachi, Ltd.).
It was determined from the Kubelka-Munk equation. The greater this value, the greater the deep chromaticity. k / s = (1−R) ↑ 2 / 2R R is the reflectance at the position of the maximum absorption wavelength in the visible portion reflectance curve of the sample cloth.

Example 1 and Comparative Example 1 Perhydrodimethanonaphthalenediethanol [Formula (I)
A compound wherein m = 1 in the compound represented by the formula: 6.7
The slurry was prepared by adjusting the molar ratio of diol raw material to terephthalic acid to 1.2: 1 from the diol raw material consisting of 93.3 mol% of ethylene glycol and 93.3 mol% of ethylene glycol. Is formed and the slurry is pressurized (absolute pressure 2.
5 kg / cm ↑ 2), esterification rate 9 at temperature 250 ° C
The esterification reaction was carried out until the content reached 5% to produce a low polymer. Next, 350 ppm of antimony trioxide was added as a catalyst, and at a pressure of 280 ° C. under a reduced pressure of 1 torr absolute pressure.
5 hours polycondensation of low polymer, intrinsic viscosity 0.65dl /
g of polyester was produced. This polyester is extruded from a nozzle into a strand shape and cut to a diameter of 2.8 m.
m, a columnar chip having a length of 3.2 mm was produced.

[0031] The obtained polyester chip was used as a # 1H-N
When analyzed by MR, it was confirmed that perhydrodimethanonaphthalenediethanol was copolymerized in the polyester in an amount of 8 mol% in all dicarboxylic acid units. Further, Tg of the obtained polyester chip was 83 ° C., Tm was 232 ° C., and ΔH was 28 J / g.

This polyester chip was melt-extruded by an extruder, discharged at 290 ° C. from a 0.15Φ × 196 hole round nozzle, and wound up at 1000 m / min. Then, using a hot roller at 78 ° C. and a hot plate at 120 ° C., the film was stretched at a stretch ratio of 3.1 times to obtain 50 deniers / 1.
An ultra-fine multifilament of 96 filaments (single yarn fineness: 0.26 denier) was obtained. An extra-fine covering yarn is formed by simultaneous false twisting with an overfeed difference of 15% so that the multifilament is a side yarn and a 50 denier / 16 filament polyethylene terephthalate multifilament is a core yarn. Created.

Then, the two covering yarns are combined into 3
After a twist of 00 T / M was applied to prepare a 2/2 twill woven fabric using the warp and the weft, the fabric was immersed in a 5% aqueous sodium hydroxide solution at 80 ° C. to reduce the weight by 7%.

Then, staining was performed under the following conditions. Dianix Blue BG-FS (manufactured by CIDisper: Blue 113) 5.5% Dianix Black HG-FS (manufactured by Mitsubishi Kasei) 7.0% Disper TL (manufactured by Meisei Chemical Co., Ltd.) 1 g / liter acetic acid (98.5 pure) %) 0.2 cc / liter Dyeing time 60 minutes Dyeing temperature 130 ° C. Bath ratio 1:50 Alkaline reduction washing Sodium hydroxide 1 g / l Amilazine D (Daiichi Kogyo Seiyaku Co., Ltd.) 1 g / l Hydrosulfide 1 g / l Washing time 20 Min Washing temperature 80 ° C Bath ratio 1:50

On the other hand, using polyethylene terephthalate having an intrinsic viscosity [η] of 0.65,
An ultra-fine multifilament of 0 denier / 196 filaments was obtained. Using this multifilament as an outer peripheral yarn, a covering yarn and a twill fabric similar to those in Example 1 were prepared and dyed (Comparative Example 1). The woven fabric obtained in Example 1 has a low L ↑ * value, has very good color developability, suppresses specular reflection of light, and has a deep moist luster that cannot be obtained with a conventional ultrafine fiber fabric. Was. In addition, the woven fabric has a slimy feeling and stiffness unique to ultrafine fibers, and despite the ultrafine fibers covering the surface of the woven fabric, has a good coloring property,
It was a cashmere, wool-like fabric. Further, despite the large amount of dyeing, the dyeing fastness was good, as it was class 4 stain. On the other hand, although the woven fabric obtained in Comparative Example 1 had a large amount of dyeing, irregular reflection of light peculiar to ultrafine fibers occurred, the hue was whitish, and the L ↑ * value was large.

Example 2 and Comparative Example 2 Polyester was prepared in the same manner as in Example 1, and the polyester was used as an island component, and polyethylene was used as the sea component. (Several 37 islands) were spun. The obtained spun yarn was made into a 400,000-denier tow, stretched in a water bath, crimped, and cut to prepare a staple of 3.5 denier and 64 mm. Then, a web was prepared using a roller card, and four webs were overlapped to perform a needling-heat-fixing-two slices.
Then, polyethylene as a sea component was dissolved and removed using 80 ° C. of parylene to obtain an ultrafine polyester fiber nonwoven fabric having a single fiber fineness of 0.08 denier.

The nonwoven fabric was impregnated with polyurethane, coagulated and dried, and treated with a 4% by weight aqueous sodium hydroxide solution at 90 ° C. to reduce the weight by 7.5%. Thereafter, buffing was carried out using sandpaper and staining was carried out under the following conditions. Dianix Blue BG-FS (manufactured by CIDisper: Blue 113) 5.5% Dianix Black HG-FS (manufactured by Mitsubishi Kasei) 7.0% Disper TL (manufactured by Meisei Chemical Co.) 1 g / liter Carrier (trichlorobenzene) 1 g / 1 liter Acetic acid (98.5% pure) 0.2 cc / liter Dyeing time 90 minutes Dyeing temperature 98 ° C. Bath ratio 1:50 Alkali reduction washing Sodium hydroxide 1 g / l Amilazine D (Daiichi Kogyo Seiyaku) 1 g / l Hydrosulfide 1 g / liter Washing time 20 minutes Washing temperature 80 ° C Bath ratio 1:50

On the other hand, a brushed nonwoven fabric was prepared in the same manner as in Example 2 using polyethylene terephthalate having an intrinsic viscosity [η] of 0.65 (Comparative Example 2). The non-woven fabric obtained in Example 2 has a slightly larger amount of dyeing than the non-woven fabric obtained in Comparative Example 2, and has good color developability for a large amount of dyeing, and mirror reflection of light. , And had a deep, moist luster that cannot be obtained with the conventional ultrafine fiber nonwoven fabric. In addition, the dyeing fastness is excellent, and it is a high value-added product due to its soft suede touch and deep hue. Although the nonwoven fabric obtained in Comparative Example 2 had a large amount of dyeing, diffuse reflection peculiar to ultrafine fibers occurred, the hue was whitish, and the deep color was low.

[0039]

[Table 1]

Example 3 A polyester was prepared in the same manner as in Example 1, and 5% by mole of 5-sulfoisophthalic acid and 8% by weight of polyethylene glycol having a molecular weight of 2,000 were copolymerized with the polyester as an island component. In order to make polyethylene terephthalate a sea component, a multi-core sheath-island structure fiber (single fiber island number 37
Island). The obtained spun yarn was drawn to obtain a multifilament of 50 denier / 16 filament.
The drawn yarn was used for the weft, and a polyethylene terephthalate single yarn of 75 denier / 24 filaments was used for the warp to prepare a satin woven fabric having a large amount of weft on the surface. And sodium hydroxide aqueous solution (concentration 20 g / l)
The woven fabric was immersed therein at 98 ° C. for 15 minutes and subjected to an alkali treatment to obtain a satin woven fabric with a single yarn fineness of 0.07 denier, in which the sea component of the weft was completely removed. . Then, under the staining conditions of Example 1, Dianix Blue BG-F
Dianix Red B instead of S and Dianix Black HG-FS
Using 7.5% of N-SE (manufactured by CIDisper: Red 127), staining was carried out together with a dispersant, and alkali reduction washing was performed. The resulting dyed product had a color depth and luster, and had a feeling and coloration very similar to silk which was rich in creaking.

Example 4 A polyester was prepared in the same manner as in Example 1, and the polyester and nylon 6 (1013BK, manufactured by Ube Industries) were alternately arranged radially (composite ratio: 1/1 weight ratio). A 75-denier / 36-filament composite multifilament was spun and drawn by a conventional method. The obtained composite stretched yarn is used as a front yarn, and a polyester filament of 50 denier / 24 filaments is used as a back yarn.
G 1/3 satin tricot knitted fabric was prepared. The front yarn of this knitted fabric is raised 10 times using a German-style needle cloth raising machine, a part of the cross section of the composite fiber is peeled off, and then a swelling treatment is performed to completely separate and separate the composite fiber to make it ultrafine. A suede-like tricot having a surface brushed mixture of polyester having a single-fiber fineness of 0.25 to 0.27 denier and nylon 6 having a single-fiber fineness of 0.25 to 0.27 denier. I got a knitted fabric. Next, when polyester and nylon 6 were dyed into dark tea, despite the fine denier,
A deep hue was obtained. The proportion of the ultrafine polyester constituting the knitted fabric was about 60% by weight.

Examples 5 to 8 Polyester chips were prepared by copolymerizing the compounds represented by the formulas (I) and (II) at the ratios shown in Table 2. Table 2 shows the physical properties of the polyester.
Using this chip, spinning and drawing were performed in the same manner as in Example 1, and then a woven fabric was prepared. Both have good processability,
In addition, a woven fabric having a good feeling and coloring was obtained.

Comparative Examples 3 and 4 Polyester chips were prepared by copolymerizing the compounds represented by the formulas (I) and (II) at the ratios shown in Table 2, respectively. Since-was amorphous, yarn breakage occurred frequently during stretching.

[0044]

[Table 2]

[0045]

According to the present invention, by co-polymerizing a specific compound with polyester, ultra-fine fibers made of polyester having a reduced refractive index, particularly ultra-fine fibers having a single-fiber fineness of 0.3 denier or less, are formed into at least one of the constituent fibers. The fabric used as the portion has excellent color developability and a deep hue, despite the use of ultrafine fibers.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-98566 (JP, A) JP-A-5-17560 (JP, A) JP-A-5-43673 (JP, A) JP-A-7- 150418 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) D03D 15/00 D01F 6/84 309 D01F 8/14

Claims (1)

(57) [Claims] 1. A fabric containing 10% by weight or more of ultrafine fibers having a single-fiber fineness of 0.3 denier or less, wherein the ultrafine fibers contain terephthalic acid as a main dicarboxylic acid component and ethylene glycol as a main component. And a compound represented by the following formula (I) in an amount of 1 to 20 mol% based on all diol components, and / or the following formula (II):
1 to 2 with respect to all dicarboxylic acid components
An ultrafine fiber cloth, which is a polyester fiber obtained by copolymerizing 0% by weight. Embedded image (In the formula, m represents 0, 1, or 2.) (Wherein, R represents a hydrogen atom or a lower alkyl group;
Represents 0, 1 or 2. )